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High Disinfectant Tolerance in Pseudomonas spp. Biofilm Aids the Survival of Listeria monocytogenes.


ABSTRACT: Pseudomonas spp. are the most commonly found bacteria in food-processing environments due to properties such as a high growth rate at low temperatures, a high tolerance of antimicrobial agents, and biofilm formation. In this study, a set of Pseudomonas isolates originating from cleaned and disinfected surfaces in a salmon processing facility were screened for biofilm formation at 12 °C. A high variation in biofilm formation between the isolates was observed. Selected isolates, in both planktonic and biofilm states, were tested for resistance/tolerance to a commonly used disinfectant (peracetic acid-based) and antibiotic florfenicol. Most isolates showed a much higher tolerance in the biofilm state than in the planktonic state. In a multi-species biofilm experiment with five Pseudomonas strains with and without a Listeria monocytogenes strain, the Pseudomonas biofilm appeared to aid the survival of L. monocytogenes cells after disinfection, underscoring the importance of controlling the bacterial load in food-processing environments.

SUBMITTER: Thomassen GMB 

PROVIDER: S-EPMC10304169 | biostudies-literature | 2023 May

REPOSITORIES: biostudies-literature

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High Disinfectant Tolerance in <i>Pseudomonas</i> spp. Biofilm Aids the Survival of <i>Listeria monocytogenes</i>.

Thomassen Gunn Merethe Bjørge GMB   Reiche Thorben T   Hjørungnes Martinus M   Mehli Lisbeth L  

Microorganisms 20230527 6


<i>Pseudomonas</i> spp. are the most commonly found bacteria in food-processing environments due to properties such as a high growth rate at low temperatures, a high tolerance of antimicrobial agents, and biofilm formation. In this study, a set of <i>Pseudomonas</i> isolates originating from cleaned and disinfected surfaces in a salmon processing facility were screened for biofilm formation at 12 °C. A high variation in biofilm formation between the isolates was observed. Selected isolates, in b  ...[more]

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